Question

Mention some contributions of Stephen Hawking??? Plz answer it friends.....

Answer 1

1.define Hawkings was the great scientist of the space science
2.Stephen Hawkings has written with their own book named a brief history of time
3.

Answer 2

1) The large-scale structure of Space-time:

Hawking with his colleague George Ellis worked on the foundation of 'space' and nature of infinite expansion of the universe, described the large scale structure of the universe in terms of space time using Einstein's General Relativity. The classic book 'The Large Scale Structure of Space-time' contains these works.

2) Hawking-Penrose theorem:

Sir Roger Penrose and Stephen Hawking proved in a theorem that Einstein's General Relativity must break down at a certain point in Space-time under certain generic physical conditions. This point is called 'Singularity'. There is singularity point inside a Black Hole and also at the moment of creation of the Universe.

3) Hawking Radiation:

The greatest work by Hawking. Almost all the physicists once thought that Black Hole is just a swallowing machine and it's a dead thing because we can know nothing about it as nothing comes out of it. That's the classical General Relativistic picture. Few physicists roughly speculated that Black Hole can be a little different. Hawking, for the first time, used Quantum Mechanics in the General Relativistic realm and rigorously showed that Black Holes can radiate and has temperature. This work has given rise of a lot of research activities in the field of 'Black Hole Thermodynamics' and 'Quantum Mechanics in curved space-time'. It could open a path towards the final unified theory of Physics called 'Quantum Gravity' or more popularly 'The Theory of Everything'